Draft-regulator for steam-boilers.



W. A. KITTS. DRAFT REGULATOR ron STEAM BOILBRS.

APPLIOATION FILED SEPT. 26,1904,

Patented Nov.10,1908,

UNITED STATESA ATENT i'. wILLARD A; Kirrs, or oswneo, NEW Yoan,r AssIeNoR To Kurs i COMPANY,OF OSWEGO, NEW' YORIQA CORPORATION OF NEW YORK.

nnnrrsnnetmuon For; s'rnmnornnns.-

' sppeiacatian n netter; Patent.

.patented Nov. 1o, 1908.:

Animados-ane sepumberee, 1964. sum No. estese.'

To all whom 'it may concern:

Be it known -that I, WILLARD A. Krr'rs, of Oswego, in the county of' Oswe o, in the `State of New York, have inven new and useful .Improvements in Draft-Re lators for Steam-Boilers, of which the fo lowing,

taken in connection with the accompanying from the boiler and connected t0 a suitable' lever, which in turn, is connected to the=- draft regulating damper. I have discovered',l however, that this form ofl damper. and'con' troller is slow in. action owing to the gradual rise and fall of the steam pressure, and the object of my invention is to controllthe action of vthe damper directly by means of al constant Huid pressure, which in turn, lis controlled by the steam pressure through'the medium-of a suitable valve for controlling the flow ofthe fluid. In other words, I'havesought to provide means controlled by the.

steam pressure for movingrothe draft regulating damper positively m 'one extreme to the other as the steam ressure rises and falls above or below ai etermined de ee.

In the drawings-Flgurel is a. side e eva tion of my invention-shown as operatively connected to a-draft: regulating damper ofa steam boiler. Fig. 2 is ari-enlarged sectional view. of the valvechamber and valve for controlling-the flow offluid to and from the iluidreservoir. -Fi B'and 4 are perspeed tive views respective y ofthe valve andval've' casing. Fig; 5'v is a perspectiveview of .the

spring which operates'the-valvein one dstem; Fi i 7 'and 8 are pers ctiv'e' views e upperandl vrespective y `of the cape` for. l .lower'ends of" 'the'valve casing. g

., Ingcarryingroutthe ob'ects-ofmy mven ti'oifl rovlde a suitab e steam chamber 741i with .a-,steam inlet pipe 2'- and a mdvable" di'phmmj The. steam" chamber 1- 1s composed-oflowera-nd up.-I r dlsh-shaped sections secured together and the diaphragm f3- is secured between the meeting facesiof! the steamchambersecwhieh divides the interior of the cha-mba" -1-. into lowerand upper compartments, the inlet4 conduit 2vcommunicating withv thelower compartment, as best seen inFig; 1. This diaphragm is provided with a-stem' erture in the upper section .of the chamber- -1- `and isengaged by. a weighted" lever G4- havf -one end fulcrumed at -7- at oneside of t e stem-4-51- and itsvother end. connected to a suitable weight -8-.

The steam chamber -1- is mounted upon onplate -9-, and secured to the lowerr face offthfop osite end of' said plate is a fluid 'or vtiate'ltlc 'amber .-10-, whlch is composed of'lwer and" upper sections --11-,- and which are secured? together face to face'by suitable bolts I3- andfinterposedbetween these sections is va Iiexible diaphra 14'- which divides the-interior of colrrxpartments. y

. '1a-diaphragm -14-. is provided ,with a.- depending' stemv -llwhich projects .through an aperture in the lower' section -11 and is connected to one end=of a lever This lever is 'fulcrumedat Y at'y one'side ofthe stem 15 and-is provided with a'v weight --18 atthe same sideofthe stem as the fulcrum17.A 1

.'Ifheweighted end. of the lever -16- is guidedin' a bracket -19'A and'is connected. to-one'end of'a chaino'r cable 20- which is passedaround a suitable idler 2l-and'. has its opposite end connected tol an arm. 22eofa-draft regulating damper 4'Thisdamperis pivoted at Q4- inasuitablesmokeconduit 25h-.of a steam boiler, not shown, andeis movedto` its open position asseenin Figal, by aweighted arm -26 which in this instance, forms a continuation of.' the arm v-22.' A valve casin 28- is inserted froinvthe .underside of'an 'throu h an openin 29. in the plate' S-ang is proyide W-ith? shoulder -30 which engagea` the lower face of 'said plate to limitA the upward movef ace -to face, by-suitable clamping bolts 4-- tionsand constitutes'` a ilegible partition the c amber -10- into4 upper and lower' 4mentof the-valvecasing.- The of' 5.- W-hich projects through al suitable alpthe top face and at one end of a suitable :bed

los A this valve casing extends some distance above the upper face of the plate-9- and receives-a reservoir -`31-- which rests upon The upper vsides of the mainpassage -85 and, comev municating with the interior of the reservoir -31-. A similar cap 3S- is adjlustably secured in the lower end of the valve y casngd-QS- and is provided with a length" not necessary to herein illustrate or de-v wise passage `39 which terminates at its upper end 1n a valve-seat -40-4 and consti.

tutes awaterinlet passage .which may be connected to any desired source of supply,

scribe-further thanl to state, that the water supply must be under a pressure sufficient to mover the diaphragm 14- and damper which is connected thereto againstthe weight the branch passages -37- so as to prevent by which the damper is opened.

The valve casing 28-' is provided with a laterally projectlng nippleor water passage -'4llwhichis located. directly above the valve-seat 40ey and isconnected by la conduit -42- to the up er compartment of the chamber -10- or aliove thediaphragm -14-. Y I

A valve stem -43- is movable kvertically in the valve casing 2S- and is provided atits upper and lower ends respectively with..

valves -44-- and -44"-. The upper portion of the valve-stem is angular in cross -section at 453- and constitutes a guide for centering the valves -44 and 445-` with their respective seats, and at the same time affording -a water-passage between the valve stem and walls of the valve-casing -28- to permit the escape of water from. the -41 through the passage -35- and into the reservoir 31- when the valve 44- is opened. This valve-stem 43-d is elevated by means of a spring 464- which surrounds the valve-stem and is interposed between theup'per end of the cap -38 and the lower end of the an ular portion 45- tablishing communication between the inlet passage 439- and branch passage -'41- to the'upper compartment of the waterchamv ber l0- This is the normal position. of the valves when the steam pressure in the pipe.-

spring serving to `eoafrae boiler is above a predetermined degree, and therefore, the water under a constant pressure is admitted through the passages .-1397- and -4-1- into the water chamber H10- thus filling the upper compartment of the chamber -10- and depressing the central portion of the diaphra m -14-. This action of the diaphragm epressesthe adjacent end of the lever -l6- and elevates its weighted end, Which-through the chain connection -20-, operates to close the damper -23-, thereby shutting off the draft until the steam pressure in the boiler drops below the predetermined degree.

The valve 44- has an upwardly projecting reduced stem 48- which is smaller in diameter than lthe passage V35- and valve-seat -36`-, but serves as an additional guide playing in the valve-seat 36- to center the valve -44-, but its mainpurpose is to form an abutment for a vertically movable stem -49'- which isseparate from, but has its lower end resting upon'the upper end of the stem -48- while its upper end is engaged by the lower edge or face of the lever -6-.' The lower end'of this stem or plunger -494-is guidedin the upper end 4of the passage -35- above the branch passages ..-37-, but is somewhat smaller indiameter than the portion 'of the passage -35- below In the operation of) my deviceQ-assuming that the steam pressure in the chamber lisabove the predetermined degree-` say 75 pounds, andthat the weighted lever spring 4G- to close the valve --44-j-and that the draftregulating damper Q3- is still open, as seen in `Fig. ll-then the valve -44- is open landthe water under acertain pressure 'ispermitted to pass through the passages -`39- and -4'1- into the chamber -10-, thereby depressing the diaend of the lever --6- to drop, which inturn,

causes the depression of theplunger --49;- and valve stem V443eto open the valve V-44- and to close the valve-44Q-against position. At the same tfne that 'the the diaphragm 14 is being elevated and the water inthe chamber 10lisexpellefl from said chamber through the passage -41- linto the 1 valve casing4 '-28- f which itv escapes through the passages 35- 4 and .-37- into the reservoir 31;3 and is allowed to drain offA through a conduit #-.50- in the bottom of the reservoir, said conduitbeingusually connected 'to a sewer A. or other waste-pipe."

form and thereby malntain The. object of making .the cap B4-.adjustable is to vary the amount of opening of the valve #44- so that when the water pressure is high andthe feed more rapid theca S4- may be screwed down to re- -duce t e amount of opening of the -valve ,-44- and when the water vpressure is low and the feed slower said cap may be unscrewed to move its seat '-36- upward and thereby allow the valve -44- to open a greater distance so that the feed to the cham.

ber -12- will bel kept substantially unia uniformv ac:

tion of the lever -16.

Having thus described myinvention, what I claim and desire to secure by Letters Pat- In a damper` draft regulator for steam boilers, the combination with'the draft regulating damper of a boiler, and means to open lthe damper, of a steamreceiving chamber hav- 'ing an inlet and a movable diaphragm operable by the steam pressure in said chamber, a 'weighted lever operatively connected to and-actuated by said diaphragm, a second pressure of the water upon thel the weightedarm- 26u to return 4it to its open rom chamber constituting a Water receiving chamber to. receive Water under pressure and .having Ian inlet and a movable dia phragm operable under the pressure of the water in said water chamber, a common support for said steam receiving chamber and said Water receiving chamber, a valve casing suspended from said support anda reservoir' surrounding the upper end of said valve casmg and mounted on said sup ort, a weighted lever operatively connected at its one end to and actuated by the diaphragm in the said. water chamber, a connection between the Weighted end of said last named lever and the damper and disposed to close the latter when thejweighted end of said lever is elevated, said valve casing being in communication with'the said water receiving chamber, a valve seat 1n sald caslng below the point of communlcation Witli the receiving chamber, a valve seat in said casing abovev v,sald point of communlcation, a, valve 1n said valve casingI for vertical movement therein and adapted -to engage sald seatsto close communication respectively between the valve chamber and the reservoir andbetween the inlet of the valve chamber andthe water receiving' chamber, a spring adapted to hold the valve released from the lowermost seat and seated lagainst the uppermost seat, a cap threaded into the upper end of said valve casing Jlor regulating the amount of movement of saidl valve and having an axial port,

and lateral ports establishing communication Abetween the axial port and the reservoir,

and a stem in said cap resting on the-upper end of the valve and guided by said cap and having its upper end engaged by the first mentioned weighted lever.

In witness whereof I have hereunto set my hand on this 14th day 0f September 1904.

' WILLARD A. KITTs.

Witnesses:

H. E. CHASE, J. M. HAMMEKEN. 

